Water-insoluble monoazo dyes containing 3-amino-2,1-benzisothiazole coupled to an n,n-disubstituted aniline

ABSTRACT

MONOAZO DYES OF A 3-AMINO-2, 1-BENZISOTHIAZOLE COUPLED TO AN N,N-DISUBSTITUTED-ANILINE DERIVATIVE, SAID DYES BEING ESPECIALLY USEFUL FOR DYEING SYNTHETIC TEXTILE MATERIAL OF FIBER-FORMING POLYESTERS AND POLYAMIDES AND EXHIBITING FOOD FASTNESS PROPERTIES.

United States Patent US. Cl. 260-158 Claims ABSTRACT OF THE DISCLOSURE Monoazo dyes of a 3-amino-2,l-benzisothiazole coupled to an N,N-disubstituted-ani1ine derivative, said dyes being especially useful for dyeing synthetic textile material of fiber-forming polyesters and polyamides and exhibiting good fastness properties.

This invention relates to dyes having the general For- CHz- CH3 @OQQ 3,573,273 Patented Mar. 30, 1971 The ring B may bear as substituents for example alkyl, alkoxy or nitro groups or halogen atoms. Methyl, ethyl, methoxy or ethoxy groups or chlorine or bromine atoms are suitable.

The part of the molecule having the formula and stemming from the coupling component is preferably derived from an aniline having the Formula H or III:

HN-G O-alkylene-Y- (III) in which R and R may be identical or different and denote unsubstituted or substituted alkyl radicals and R may denote a hydrogen atom and in which the ring C may also hear substituents, for example alkyl, alkoxy or halogen. Specific examples of substituents for the ring C are methyl, ethyl, methoxy or ethoxy groups or chlorine atoms.

Coupling components having the Formula II may also hear acylamino groups, such as acetylamino or propionylamino groups, as substituents.

Examples of unsubstituted or substituted alkyl radicals R and R are methyl, ethyl, propyl, butyl, fl-hydroxyethyl, fi-methoxyethyl, fl-ethoxyethyl, fi-cyanoethyl S-chloroethyl, fi-acetoxyethyl B-carbornethoxyethyl, fl-carboethoxyethyl, ,8 hydroxypropyl, 5, dihydroxypropyl, ,B-acetylaminoethyl or vacetylaminopropyl radicals.

The al-kylene radical in the above formulae preferably has one to four carbon atoms and may be linear or branched.

Specific examples of compounds having the Formula II or III are as follows:

CHg-CHz-ON CHr-OHz-OH The diazo components of the new dyes having the Formula I are derived from amines having the general Formula IV: V

| R Z (V in which A and B may be identical or dilferent and each may denote a nitro, methyl, methoxy, ethoxy, methylsulfonyl, ethylsulfonyl, cyano, carbomethoxy or carboethoxy group or a hydrogen, chlorine, bromine or fluorine atom;

X denotes a hydrogen atom or a methyl, ethyl, methoxy Dyes having particularly valuable tinctorial properties are those having the Formula VI:

Z (VI) in which D denotes a hydrogen, chlorine or bromine atom, n denotes one of the integers 1 and 2. Z denotes a hydrogen or chlorine atom or a methyl group and in which R has the meanings given for Formula V.

Dyes having the Formula I are obtained when diazo compounds of amines having the Formula IV are reacted by a conventional method with a coupling component having the Formula VII:

HKalkylene-Y (VII) The dyes according to this invention are particularly suitable, especially in finely divided form, for dyeing materials, such as fibers, flock, filaments, thread, woven cloth or knitted fabric, of linear polyesters, such as polyethylene glycol terephthalate. Cellulose esters, such as secondary cellulose acetate or cellulose triacetate, or polyarnides or mixtures of the said fibers, may also be dyed therewith. The dyes according to the invention go on very well and the dyeings prepared therewith have good fastness properties. In many cases the excellent fastness to wet and heat may be emphasized.

The invention is illustrated by the following examples. Parts and percentages mentioned in the following examples are by weight.

OzN

EXAMPLE 1 9.75 parts of 3-amino-5-nitro-2,1-benzisothiazole is introduced at 10 to 15 C. into 100 parts of parts of 85% sulfuric acid. 15 parts of nitrosylsulfuric acid (having a content of 12.8% of free dinitrogen trioxide) is allowed to drip into the resultant solution at 0 to 5 C.

The clear diazo solution formed is stirred for three hours at to C., and then at this temperature a solution of 12.75 parts of N-B-oxyethyl-N-p-phenylethyl-metatoluidine in 50 parts of glacial acetic acid is allowed to flow in, the whole is stirred for another thirty minutes and the solution is introduced into 1500 parts of ice and water. The dye, which is precipitated in crystalline form, is stirred for six hours, suction filtered, washed with water and dried at 50 C. under subatmospheric pressure. The dye thus obtained dyes polyethylene glycol terephthalate blue shades having very good Wet and thermal fastness properties.

When the components set out in the following table are used instead of the coupling components specified in Example 1, dyes having similar properties are obtained.

Shade of dyeing on Ex. No Coupling component polyester (hill-ON 2 N Navy blue.

I CH3 1 (|}2H4-OCCH3 3 (IJQH4OC-CH 4 N Do.

I (J2H4- CHa C2H4O 02-0211 Navy blue 5 N\ C 2H4OH Blue. 6 N\ C2H4OH Blue violet. 7 N\ I Cl C2H4OH Navy blue. 8 -N\ C2H4OH Do. 9 N\ C2l-I4CN Blue violet. 10 N\ H De. C2HAO'C'CH3 11 -N C 2H4O H Navy blue.

Shade of dyeing on Ex. No. Coupling component polyester I? Blue violet. /C2H4-O -CH3 13 Navy blue. /C2H4- M CH2OHCH2 OH OH Blue.

OH2CH CH1 H3 OH OH C2H4- Navy blue. 16 N C2H4?HCH2-C1 /C2H4-O CH3 D0. 17

C 2H4O H Turquoise.

IINCOCHB EXAMPLE 19 13.7 parts of 3 amino 5 nitro 7 bromo 2,1- benzisothiazole is dissolved in 120 parts of concentrated sulfuric acid at 10 to 15 C. 50 parts of a mixture (17.3) of glacial acetic acid and propionic acid is allowed to drip into this solution at 0 to 5 C., diazotization then being carried out at this temperature by the gradual addition of 15 parts of nitrosyl sulfuric acid (having a content of 12.8% of free dinitrogen trioxide). After having been stirred for three hours, the resultant clear diazo solution is allowed to flow gradually into a solution of 14.85 parts of N 5 acetoxyethyl N 3 phenylethyl meta toluidine, 250 parts of acetone, 10 parts of concentrated hydrochloric acid and parts of ice. Stirring is continued for another thirty minutes and then 1000 parts of ice and water is added; the dye which is precipitated in crystalline form is suction filtered, washed and dried at 50 C. at subatmospheric pressure. This dye gives on polyethylene glycol terephthalate a dove blue dyeing having very good thermal fastness properties. When the coupling components set out in the foregoing table are used instead of N 8 acetoxyethyl N B phenylethyl meta toluidine and the procedure of Example 19 is followed, dyes are obtained which have undergone bathochromic displacement of shade as compared with dyes prepared with 3- amino-S-nitro-Z,l-benzisothiazole as diazo component.

EXAMPLE 20 1145 parts of 3-amino-5-bromo-2,l-benzisothiazole is dissolved in parts of concentrated sulfuric acid at 10 to 15 C. 50 parts of a mixture (17:3) of glacial acetic acid and propionic acid is first allowed to flow into this solution at 0 to 5 C. and then diazotization is carried out at the said temperature by the gradual addition of 15 parts of nitrosylsulfuric acid (having a content of 12.8% of free dinitrogen trioxide), after which the whole is stirred for another three hours. The resultant clear diazo solution is allowed to flow into a solution of 14.85 parts 11 of N-fi-acetoxyethyl-N-fl-phenylethy1-meta-toluidine, 250 parts f acetone, 10 parts of concentrated hydrochloric acid and 75 parts of ice While simultaneously allowing a solution of 164 parts of sodium acetate in 800 parts of Water to flow in. The product is Worked up by conventional methods and a dye is obtained which dyes polyamide red violet shades having good fastness properties.

We claim: 1. A dye having the formula s B I in which A and B each denotes hydrogen, chlorine, bromine, fluorine, nitro, methyl, methoxy, ethoxy, methylsulfonyl, ethylsulfonyl, cyano, carbornethoxy or carboethoxy, X denotes hydrogen, methyl, ethyl, methoxy or ethoxy, Z denotes hydrogen, chlorine, bromine, methyl, acetylamino, propionylamino, methoxy or ethoxy, Y denotes oxygen, sulfur or a direct bond, R denotes methyl, ethyl, propyl, butyl, B-hydroxyethyl, fi-methoxyethyl, (3- ethoxyethyl, fl-cyanoethyl, B-chloroethyl, fl-acetoxyethyl, fi-carbomethoxyethyl, fi-carboethoxyethyl, ,B-hydroxypropyl, fi,-, -dihydroxypropyl, ,B-acetylaminoethyl or 'y-acetylaminopropyl, and n denotes one of the integers 1 and 2.

2. A dye having the formula R Z i in which D denotes hydrogen, chlorine or bromine, n denotes one of the integers 1 and 2, Z denotes hydrogen, chlorine or methyl and R denotes methyl, ethyl, propyl, butyl, fl-hydroxyethyl, ,B-methoxyethyl, B-ethoxyethyl, ficyanoethyl, S-chloroethyl, B-acetoxyethyl, B-carbometh- 5 oxyethyl, ,B-carboethoxyethyl, ,B-hydroxypropyl, fLy-dihydroxypropyl, fi-acetylaminoethyl or 'y-acetylaminopropyl.

3. The dye having the formula:

i OzN \(I'J (llzHlCN 4. The dye having the formula:

\S H (Inn-14o 0-011, References Cited UNITED STATES PATENTS 3,455,898 7/1969 Seefelder et a1. 260-158 3,478,011 11/1969 Artz 260-158X FOREIGN PATENTS 894,012 4/1962 Great Britain 260158 FLOYD D. HIGEL, Primary Examiner US. Cl. X.R.

UNITED ST ATE'IS PATENT DEFECT rw v w Y -I; (MC CElKTIUJlQ/ATM O1 COM-am- .L r'lw Patent No. 3, 573, 73 Dated March 5 971 lnventofls) Matthias Socfelder' et a1 It is certified that error appears in the above-idcntificd paton' and that said Letters Patent are hereby corrected as shown below:

Column 1, line 5, "Seedfeldor" should read seofolder Column 2, line 55, )Q-cyanoethyl" should read fl-o'yanoe line 36, fi-acetoxyethyl" should read fl-aoetoxyetl Column 10, line #1, "(17.3)" should read (17:3)

Column 11, line 2, "0" should read of Signed and sealed this 2lth day of August 1971.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. WILLIAM E. SCHUYLER, JR. Attesting Officer Commissioner of Patents 

